Yellow-bellied is an adjective that is used to describe someone who is cowardly or lacks courage. Antonyms for this word include brave, courageous, bold, confident, fearless, and daring. These opposing terms describe individuals who possess qualities of fearlessness and valor in the face of danger. While "yellow-bellied" is a commonly used term, using antonyms to describe someone who is brave and courageous is a more positive way of addressing their qualities. When we want to highlight a person's bravery, using these opposing terms can help us accentuate and appreciate their resolute and dauntless nature.